INTERNATIONAL EARTH ROTATION SERVICE (IERS)
SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE
BUREAU CENTRAL DE L'IERS
OBSERVATOIRE DE PARIS
61, Av. de l'Observatoire 75014 PARIS (France)
Tel. : 33 (0) 1 40 51 22 26
FAX : 33 (0) 1 40 51 22 91
Internet : iers@obspm.fr
Paris, 7 January 1998
Bulletin C 15
To authorities responsible for
the measurement and distribution
of time
INFORMATION ON UTC - TAI
No positive leap second will be introduced at the end of June 1998.
The difference between UTC and the International Atomic Time TAI is :
from 1998 January 1, 0h UTC, until further notice : UTC-TAI = - 31 s
Leap seconds can be introduced in UTC at the end of the months of December
or June, depending on the evolution of UT1-TAI. Bulletin C mailed every six
months, either to announce a time step in UTC, or to confirm that there will
be no time step at the next possible date.
Daniel GAMBIS
Director
Central Bureau of IERS